2564543236 has 6 divisors (see below), whose sum is σ = 4487950670. Its totient is φ = 1282271616.

The previous prime is 2564543209. The next prime is 2564543243. The reversal of 2564543236 is 6323454652.

It can be written as a sum of positive squares in only one way, i.e., 2480637636 + 83905600 = 49806^2 + 9160^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320567901 + ... + 320567908.

Almost surely, 2^2564543236 is an apocalyptic number.

It is an amenable number.

2564543236 is a deficient number, since it is larger than the sum of its proper divisors (1923407434).

2564543236 is a wasteful number, since it uses less digits than its factorization.

2564543236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641135813 (or 641135811 counting only the distinct ones).

The product of its digits is 518400, while the sum is 40.

The square root of 2564543236 is about 50641.3194535845. The cubic root of 2564543236 is about 1368.7895316147.

Adding to 2564543236 its reverse (6323454652), we get a palindrome (8887997888).

The spelling of 2564543236 in words is "two billion, five hundred sixty-four million, five hundred forty-three thousand, two hundred thirty-six".